question_answer

A transistor is used in common emitter mode as an amplifier. Then                                          [IIT-JEE 1998]

A)            The base-emitter junction is forward biased

B)            The base-emitter junction is reverse biased

C)            The input signal is connected in series with the voltage applied to the base-emitter junction

D)            The input signal is connected in series with the voltage applied to bias the base collector junction

Correct Answer: C

Solution :

                   The circuit of a CE amplifier is as shown below. This has been shown a NPN transistor. Therefore base emitter are forward, biased and input signal is connected between base and emitter.